Website content different for Mobile than for PCs

Hi
I found out a very strange behaviour that one of you guys might be able to explain or help me solve it.

I just launched a new blog http://whatsnewinsiliconvalley.com which works well on PC and Mac but for some reason which baffles me the content displayed on the iPhone or any mobile I suppose is not up to date. It displays a very old post.

And that happens only for the home page. The content can be access directly without a problem from the iPhone http://bit.ly/yI091z

Hi Tim
Yes I checked that first and there is no variable to set related to that topic.

More importantly there is no post Hello World on that site anymore (I deleted it).

My logic (if i am correct) would be that it is an issue with Domain Mapping?
This site shares a MultiSite install with others.
Although the other domains do not have the issue at hand so I don't get it

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